ADAGE CAPITAL PARTNERS GP, L.L.C.

Position in RIO — Rio Tinto PLC

CIK 1165408 Boston, MA

Position in RIO

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$48,940,120

-$5,048,278 QoQ

Shares Held

524,602

-22.2% QoQ

Ownership

0.042%

of shares outstanding

% of Portfolio

0.08%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2024

9 quarters on record

Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Basic Materials · as of Mar 31, 2026

ADAGE CAPITAL PARTNERS GP, L.L.C. holds $105,878,594 across 5 Other Industrial Metals & Mining names. RIO ranks #1 (46.2% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	RIO	Rio Tinto PLC This page	524,602	$48,940,120
2	TECK	Teck Resources Ltd	616,916	$31,925,403
3	USAR	USA Rare Earth, Inc.	1,160,000	$17,556,600
4	LZM	Lifezone Metals Ltd	1,788,295	$6,008,671
5	MP	MP Materials Corp. / DE	30,000	$1,447,800

9 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$48,940,120	524,602	-22.2%	Shares	Sole	2026-05-15
2025-12-31	$53,988,398	674,602	+8.0%	Shares	Sole	2026-02-17
2025-09-30	$41,229,978	624,602	+19.1%	Shares	Sole	2025-11-14
2025-06-30	$30,600,034	524,602	+555.8%	Shares	Sole	2025-08-14
2025-03-31	$4,806,400	80,000	-86.4%	Shares	Sole	2025-05-15
2024-12-31	$34,697,900	590,000	-18.6%	Shares	Sole	2025-02-14
2024-09-30	$51,598,250	725,000	+61.1%	Shares	Sole	2024-11-14
2024-06-30	$29,668,500	450,000	-43.8%	Shares	Sole	2024-08-14
2024-03-31	$50,992,000	800,000	—	Shares	Sole	2024-05-15
No filing history on record for this holder in this stock.